Lay-rock-shaft bearing for looms



March 17, 1925. H. A. DAVIS LAY ROCK SHAFT BEARING FOR LOOMS Filed March 18, 1924 1 BY ATTORNEY To all whom it may concern." HARRYA. DAVIS, a

Patented Mar. 17; 19 25.

UNIT-EDISTATETSI PATENTIOFFVVICE,

HARRY A. DAVIS, or HOPEDALE, MASSACHUSETTS, assrenon ro nrmrnn oonronA- TION, or HOLPIEDALE, MASSACHUSETTS,,ACORBORATION or MAINE.

' LAY-ROOK-SHAFT BEARING non LO'OMS'.

Application fil ed Mannie, i924. Serial no. 700,016.

Be it known that I, citizen of the United States, and-resident of Hopedale, in the county of W orcester and State of Massachusetts, have invented an Improvement in Lay-Rock-Shaft Bearings for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates .to looms and more particularly to the lay rock-shaft bearings. The constant rocking movement of the lay 'rockfshaft during weaving produces wear and lost motion between thelshaft and its bearings which in time admits ob ect1onable play resulting in imperfect weaving.

The wear upon the bearings, due to the weight of the rocking parts, occurs at the lower portion of the bearings. Heretofore various expedients have been suggested for overcoming the "objections incident to the wear of the rock shaft and its bearing, but I the present invention differs from these in that the lay-rocl'reshaft itself -relieved from allwear, and transmit such wear to other parts thatmay be readily; adjusted to compensate for wear, and inexpensively renewed. I r I The present invention, among other ad vantages, provides a cheap and simple bearing which may be readily adjusted to present new wearing surfaces between the operating parts and eliminates wear on'the lay vrockshaft itself.

' The invention will best be understood from the following description and accompanying drawings of one good, practical form thereof. I I

In the drawingszv v a Fig. 1 is a perspective view of a portion of a loomand the lay rock-shaft with the present invention associated therewith.

Fig. 2 is a perspective view of the bearing showing the parts in spaced relation.

Fig. -3 is an enlarged vertical sectional view throughonebearing for the lay rockshaft; and f l Fig, dis a sectional view taken-onthe line 4.-'4eofFig.3. I

. The lOOllljfI'tLInd 1, maybe of. any usual construction and as shown the lay rock-shaft- 2 is supported near the lower portionof the side frames of the loom forrockingmovee ment. Secured to the lay rock-shaft 2 are the weft in a wellyknown manner.

The present lay rock-shaft-2, as is usual,

ring

sitionsrof adjustment-and extends into the the lay swords which are providedwith the .hub portions 4 that receive and are rigid- 'ly secured to the layrock-shaft. The upper portion of the lay swords 3 support the usual 7 lay (not shown) which is actuated as usual with a back and forth movement bya ccrank- N shaft or other going part=of the loom, the

construction being such that as, .the lay is actuated durmg weavmg 1t imovestoward j and from the front of the loom to-beat up supports the picker stick 6. v ,l*3ach of the side. frames providedwithan opening 7 as usual,;and,

is provided at each end with a shoe 5fithat as shownin the present instance, ,aboxplate' a 8 having elongated bolt openings near: its ends is adjustably secured, preferably to the outside of each side; frame ,of'the loom "by bolts 9. The box'plate S-has extending in-: wardly' therefrom a bearing sleeve IOYeXtendv hrough the; opening 7 ofthe side'frame inwardlythereof. p v

In accordance with the present invention the lay rock-shaft 2 is provided near each end' with a bushing ll which may be rigidly secured to the lay rock-shaft" in different pobearing sleeve 10, the arrangement being such that the bushing rocks with'thelay rock-shaft, [so that the wear willoccur be tween the bushing ll'and sleeve 10. As stated,,th'e greatest wear occurs at the lower portion of the operating parts, and in accordance with. the present invention the bushing 11 is adapted to be rotated upon the lay rock-shaft 2 through "a desired angle so that,- whe'n one portion of the bushing 11 becomes worn at its "lower side, the bushing may 'berotated'torbring a different portion to the underside of the lay rock-shaft. The

sleeve 10is prefe'rablyformed of harder metal than the bushingnll, so that most of the .wear will occurupon the latter, and

the bushing 11 is shown as having a head 12 at one end'whichforms a shoulder that abuts against theinner end of the sleeve 10.

Various means may be provided forrigidly securing the bushing 11 to the laylrockm5 shaft in different positions of angular adjustment, and in the construction shown the clampingmeans consists ofs-a bolt 13that'is mounted in'a bore extending" through. the

head 12 transverse1y of the, bushing. Tllef 1- of the loom is 7 bolt 13 has a notch '14 formed in one side that receives the curved face of the lay rockshaft, and the bushing is clamped to the lay rock-shaft in any desired position by tightening the nut 15 at oneend of the bolt 13. This serves to force the notched portion of the bolt against the curved face of the lay rock-shaft with clamp effect.

It is important that the operating surfaces of the bearing be properly lubricated, and to this end the box plate 8 is provided with an oil receptacle 16 having an openin leading to the bushing 11, and the bushing pref erably has a groove 18 extending" longitudinally of its face to conduct oil lengthwise thereof.

When the lower portion of the bushing 11 becomes worn, due to the rocking movement of the lay, the clamping nut 15 may be unscrewed, 'whereuponthe bushing may be rotatedupon the lay rock-shaft to'bring a new portion into the field of greatest wear and the bushing is then clamped in this new position by tightening the nut 15. I i

It is desirable to'provide means for indicating the different positions to which the bushing 11 should be rotated in taking up thewear, and'tothis end, in the present case, the head 121s provided with the raised indexes I, H and 111 shown, formed by raised ribs corresponding to the Roman numerals and indicating-the successive positions to which. the bushing should be re tated in'taking up wear. It willbe understood, however, that the indexing means may be variously formed and may indicate either more or less than the three positions of adjustment indicated in the drawing, but it is desirable that the indexes be formed so that they will not be readily hidden by dirt or grease.

In assembling the bearing of the present invention the bushing 11 will be secured in the position shown in Fig. 4: with the index I in the uppermost position, and when the bushing becomes worn it may be rotated to bring the index 11 in the uppermost position, and when it is again adjusted the index III will be rotated tothe uppermost position After the bushing has become wornin each of" these positions, it may be d scarded for a newbiishing. The bushing 11 preferably is provided with three oil grooves 18 positioned so that one will aline with the oil opening 17 for each position of bushing adjustment, and if desired holes 19 may be formed at the bottom of the grooves 18 to increase their oil capacity.

it is apparent that the bushing 11' may be adjusted with a fair degree of accuracy to the different predetermined positions indi cated by the indexesT, II, and III by simply turning the busl'iing until an index appears to be in its uppermost position, but in order to rotate the bushing accurately to the desired position so that an oil groove 18 will alizne with the oil opening 17, indicating means should be provided on the bearing sleeve 10 with which the indexes upon thehead 12 may aline. The sleeve 10 is therefore shown asprovided upon its outer face with three ribs 20 spaced in conformity with the ribs forming index 111 and raised sufficiently to preventthem from becoming readily obscured by dirt or grease. it should be noted that the two ribs forming the index II are spaced, the same distance apart as the outer ribs of the index HI. This enables the two ribs of the index 11 to be alinedwiththe o'nter ribs forming the indicating means 20, and when the index I is in its uppermost positiomit may be alined with the middle rib of the indicating means 20. Y

What is claimed is 1-. In a loomfthe combination of the oscillatory lay rock-shaft,"1ay swords secured to the lay rock-shaft, a"bushin g mounted on the la y rock-shaft, means for securing the bushing to the lay rock-shaft in different rotat-ive positions that the bush ing'may roclrwith the lay rock-shaftin its different positions of angular adjustment, including a bolt having a notched side that engages the curved face of the layrockshaft, and means for forcing th'e'bolt in the direction ofit-s length with clamping effect, and a plate secured to the loom frame and having a bearing sleeve in which the bushing is journa'led. i

2. In aloom, the'combination of the lay rock-shaft, lay swords secured to-the'lay rock-shaft, a bearing sleeve secured to the loom frame, a bushing mounted on'the lay rock-shaft and journaled in said sleeve, n'iea-ns for rigidly securing the bushing upon the lay rock-shaft in different positions of angular adjustment so that the bushing will rock with the lay rock-shaft in its di'fi erent positions of adjustment, indexes'disposed about the bushing to indicate different po'si tions of angular adjustment of the bushing upon the lay rock-shaft, and indicating means upon the bearing sleeve with which the different indexes may be aimed.

3. In a loom, the combination'of the lay rock-shaft, lay swords secured to the lay rockshact't, a bearing sleeve secured to the loom, frame, a bushing mounted on the lay rockshaft and jonrnaled in said sleeve, means for rigidly securing the bushing upon the lay rock-shaft in different positions of angular adjustment so that the bushing will rock with the lay rock-shaft in its different positions of adjustment, c'ooperatng indexes upon the bushing and bearing sleeve and disposed in angularly spaced relation about one of them to indicate different positions of angular adjustment of the bushing within said sleeve.

4; In a 100m, the combination of the lay tion, means for securing the bushing rigid 1y to the lay rock-shaft in different positions of angular adjustment so that the bushing will rock with the lay rock-shaft when secured in its different angular positions, and indexing means for designating the diflerent positions of angular adjustment of the bushing within the bearing sleeve when-the bushing is turnedto' compensate for wear and at the same time bring the different oil grooves into oil receiving positions.

e 5. In a loom, the combination of the lay rock-shaft, lay; swords secured to the lay rock-shaft, a bearing sleeve vsecured to the loom frame, a bushing mounted on the lay rock-shaftwand journaled in said sleeve,

means for rigidly securing the bushing upon the lay rook-shaft indifferent positions of angular adjustment so that the bushing will rockwith the lay rook-shaft when secured in its different angular positions, and cooperating indexes upon the sleeve and bushing for indicating difi 'erent predetermined positions of angular adjustment of the bushing when it is" turned Within the bearing sleeve to compensate for, wear. I

In testimony whereof, I have signed my name to this specification.

HARRY A; DAVIS; 

